Proform 67390 - Proform Valve Spring Height Mic Details

Measuring spring height is vital to any properly tuned engine. That is why Proform offers their own quality valve spring height mic that measures the installed valve spring height on most V8 engines. Simple to use, just install the height micrometer instead of a valve spring. Rotate the clear to read engraved dial to expand the tool to seat the valve, locks and retainer.

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